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Full detail: Where this data comes from
Airbase is a modern spend management platform for finance teams that combines accounts-payable (AP) automation and bill pay, guided procurement and purchase orders, corporate cards, and expense reimbursements on a single system with real-time general-ledger sync.
Operating status / acquisition: Airbase Inc. was acquired by Paylocity in a deal valued at approximately $325M - the definitive agreement was announced September 4, 2024 and the acquisition completed October 1, 2024. Airbase now operates as "Airbase by Paylocity," extending Paylocity's HCM suite into the office of the CFO. The product and its developer portal remain live.
API access model (important): Airbase exposes a developer platform at developer.airbase.io that documents a REST API, OpenAPI/Swagger definitions, Postman and Insomnia collections, a webhooks management API, an OAuth playground, authentication, and a sandbox. The API is real but account-gated - it is intended for Airbase customers building custom connections (notably ERP/GL) for systems not covered by the pre-built integrations, and credentials are provisioned inside the customer's Airbase/Paylocity tenant rather than through open self-serve public signup. Because the reference lives behind that gated, branded single-page portal, the logical APIs documented here are honestly modeled from the documented product surface (endpointsModeled); exact endpoint paths, the API base URL, and full OpenAPI are not fabricated.
APIs.json: https://raw.githubusercontent.com/api-evangelist/airbase/refs/heads/main/apis.yml
- Spend Management
- Accounts Payable
- Bill Pay
- Procurement
- Corporate Cards
- Expense Management
- FinTech
- Paylocity
- Gated API
- Created: 2026-07-03
- Modified: 2026-07-03
Each API below is honestly modeled from Airbase's documented spend-management product and developer portal. Endpoints are gated (endpointsModeled); exact paths are not reproduced.
Create, list, retrieve, and update bills and vendor invoices flowing through Airbase's AP automation - line items, approval state, payment status, and payment method.
- Human URL: https://developer.airbase.io/
Create and track guided purchase requests and purchase orders - intake details, line items, vendor and GL coding, budget checks, and the approval milestones a request transitions through (Airbase emits webhook events such as "purchase request approved").
- Human URL: https://developer.airbase.io/
Manage the vendor/supplier master record - vendors, payment details, tax and onboarding information, and the relationships bills, POs, and payments are made against. Airbase also runs a separate vendor portal at vendors.airbase.io.
- Human URL: https://developer.airbase.io/
List corporate and virtual cards, card holders, spend limits and controls, and card policies to reconcile card spend against budgets and the general ledger.
- Human URL: https://developer.airbase.io/
Pull unified transaction and spend data across cards, bills, and reimbursements - amounts, merchants, dates, GL coding, and reconciliation status - for reporting and close.
- Human URL: https://developer.airbase.io/
Create and track employee expense reimbursements and out-of-pocket claims - receipts, line items, approval state, and payout status.
- Human URL: https://developer.airbase.io/
Inspect and act on the multi-step approval workflows that gate purchase requests, bills, cards, and reimbursements - approvers, policy rules, current state, and milestone transitions (also delivered as webhook events).
- Human URL: https://developer.airbase.io/
Read and push general-ledger coding and accounting records so spend stays in sync with the ERP/GL. Airbase promotes a REST API specifically for building custom ERP/GL connections for systems not on its pre-built integration list.
Register and manage webhook subscriptions so external systems receive Airbase events (e.g. a purchase request approved or a workflow milestone transition) as JSON payloads (id, object, type, created_date, data).
- Human URL: https://developer.airbase.io/
FN: Kin Lane Email: kin@apievangelist.com